{"id":31643,"date":"2026-07-17T11:21:13","date_gmt":"2026-07-17T05:51:13","guid":{"rendered":"https:\/\/mycbseguide.com\/blog\/?p=31643"},"modified":"2026-07-17T11:28:05","modified_gmt":"2026-07-17T05:58:05","slug":"the-price-puzzle-what-drives-the-market-ncert-solutions-class-9-social-science-new","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/the-price-puzzle-what-drives-the-market-ncert-solutions-class-9-social-science-new\/","title":{"rendered":"The Price Puzzle: What Drives the Market – NCERT Solutions Class 9 Social Science (New)"},"content":{"rendered":"\n

The Price Puzzle: What Drives the Market<\/strong><\/strong> – NCERT Solutions Class 9 Social Science (New) Understanding Society includes all the questions with solutions given in the NCERT Class 9 Social Science Book Understanding Society textbook.<\/p>\n\n\n\n

NCERT Solutions Class 9<\/h2>\n\n\nEnglish Kaveri<\/a>\n\n\nHindi Ganga<\/a>\n\n\nSanskrit Sharada<\/a>\n\n\nMaths Ganita Manjari<\/a>\n\n\nScience Exploration<\/a>\n\n\nSocial Understanding Society<\/a>\n\n\n\n

The Price Puzzle: What Drives the Market<\/strong><\/strong> \u2013 NCERT Solutions<\/h2>\n\n\n\n

Q.1: What are the factors that influence the demand and supply of goods and services in a market?<\/strong><\/p>\n\n\n\n

Solution: The demand and supply of goods and services are influenced by several factors. Demand depends on the price of the product, consumer income, tastes and preferences, population, and prices of related goods. Supply is affected by production costs, technology, availability of resources, government policies, taxes, and the number of sellers. These factors determine the quantity available and the price of goods in a market.<\/p>\n\n\n\n

Q.2: How are prices of goods and services determined through demand and supply interactions?<\/strong><\/p>\n\n\n\n

Solution: Prices of goods and services are determined by the interaction of demand and supply in a market. When demand for a product increases, prices usually rise, while a decrease in demand may lower prices. Similarly, limited supply can increase prices, whereas excess supply can reduce them. The point where demand equals supply is called market equilibrium, where the price becomes stable and acceptable to both buyers and sellers.<\/p>\n\n\n\n

Q.3: What is market equilibrium, and does it exist in the real world?<\/strong><\/p>\n\n\n\n

Solution: Market equilibrium is the situation where the quantity demanded by consumers equals the quantity supplied by producers. At this point, the market price remains stable because buyers and sellers are satisfied. In the real world, perfect equilibrium may not always exist due to changes in demand, supply, costs, and other factors. However, markets continuously adjust to reach near-equilibrium conditions.<\/p>\n\n\n\n

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Q.4: How and why does the government intervene in the market?<\/strong><\/p>\n\n\n\n

Solution: The government intervenes in the market to ensure fair competition, protect consumers, and maintain economic stability. It regulates prices of essential goods, controls unfair trade practices, provides subsidies, and collects taxes. The government also supports public services like healthcare, education, and infrastructure. Intervention is necessary because markets may sometimes fail to provide equal opportunities or protect weaker sections of society. Through these measures, the government promotes balanced economic growth and social welfare.<\/p>\n\n\n\n

Q.5: An increase in income always leads to a rise in demand for goods. Defend or refute, giving reasons for the same.<\/strong><\/p>\n\n\n\n

Solution: The statement is not always true because an increase in income does not necessarily lead to a rise in demand for all goods. For normal goods, demand increases when income rises, as people can afford more products. However, for inferior goods, demand may decrease because consumers shift to better alternatives. Demand also depends on tastes, preferences, prices of related goods, and future expectations. Therefore, income is an important factor affecting demand, but it is not the only determining factor.<\/p>\n\n\n\n

Q.6: If petrol prices double, what happens to-<\/strong><\/p>\n\n\n\n

    \n
  1. Demand for diesel cars<\/li>\n\n\n\n
  2. Demand for electric cars<\/li>\n\n\n\n
  3. Demand for car accessories<\/li>\n\n\n\n
  4. Demand for public transport<\/li>\n<\/ol>\n\n\n\n

    Solution: If petrol prices double:<\/p>\n\n\n\n

      \n
    1. Demand for diesel cars:<\/strong> Increases because diesel cars become a cheaper alternative to petrol cars.<\/li>\n\n\n\n
    2. Demand for electric cars:<\/strong> Increases as people prefer fuel-saving options.<\/li>\n\n\n\n
    3. Demand for car accessories:<\/strong> May decrease because people spend more on fuel.<\/li>\n\n\n\n
    4. Demand for public transport:<\/strong> Increases as people choose more affordable travel options.<\/li>\n<\/ol>\n\n\n\n

      Q.7: A farmer traditionally irrigates fields manually (labour-intensive). He installs drip irrigation (a technology upgrade) that reduces water use by 40%40% and increases yield by 30%30%. How does this affect-<\/strong><\/p>\n\n\n\n

        \n
      1. His cost of production<\/li>\n\n\n\n
      2. His willingness to supply at different prices<\/li>\n\n\n\n
      3. The overall market supply if many farmers adopt this technology<\/li>\n<\/ol>\n\n\n\n

        Solution: The use of drip irrigation is a technology improvement that affects the supply of agricultural products.<\/p>\n\n\n\n

          \n
        1. Cost of production:<\/strong> It decreases because drip irrigation saves water and reduces labour and resource costs.<\/li>\n\n\n\n
        2. Willingness to supply:<\/strong> Lower production costs encourage the farmer to supply more crops at different prices, increasing his willingness to produce.<\/li>\n\n\n\n
        3. Overall market supply:<\/strong> If many farmers adopt this technology, total market supply will increase because more crops can be produced with fewer resources. This shows that improvements in technology shift the supply curve to the right.<\/li>\n<\/ol>\n\n\n\n

          Q.8: During online festival sales, the prices of many products are very low. Use the concept of demand and supply to explain why the sellers sell at such a low price. What happens to the equilibrium when the price is lowered? Does this benefit only consumers or sellers as well? Explain.<\/strong><\/p>\n\n\n\n

          Solution: During online festival promotions, vendors reduce prices to draw in more buyers and boost sales. By the law of demand, a price decline raises the quantity demanded since more consumers can afford the goods. Simultaneously, sellers may aim to liquidate older inventory or raise overall revenue by increasing units sold, even if per-item margins shrink.<\/p>\n\n\n\n

          A lower price alters the market equilibrium. With the price reduced, quantity demanded expands and, assuming sellers are prepared to offer more at that price, quantity supplied also rises. The market then reaches a new equilibrium characterized by higher sales at a lower price.<\/p>\n\n\n\n

          Both buyers and sellers can gain from this outcome. Buyers obtain goods more cheaply. Sellers move more units, clear stock, and may win repeat customers. Although each unit yields less profit, total revenue can grow because of the larger sales volume.
          In summary, lower prices during sales increase demand and sales, shifting the equilibrium and creating a win-win situation for both buyers and sellers.<\/p>\n\n\n\n

          Q.9: Suppose the government sets a maximum sale price for an essential vaccine below the market-driven price. What is likely to happen? Choose from the options below and elucidate your point.<\/strong><\/p>\n\n\n\n

          Options:
          (1) Surplus
          (2) Shortage \u2705
          (3) No effect
          (4) Fall in demand<\/p>\n\n\n\n

          Explanation: When the government sets a maximum price for an essential vaccine below the market price, it creates a price ceiling. Since the vaccine becomes cheaper, more people demand it, but producers may supply less because of lower profits. As a result, demand becomes greater than supply, causing a shortage in the market. This intervention is usually done to make essential goods affordable, but it may require proper supply management to avoid shortages.<\/p>\n\n\n\n

          Q.10: The government levies higher taxes on products such as tobacco and alcohol to promote healthier choices among citizens. Can you find out other goods where price controls have been set in place? What are the reasons for the same?<\/strong><\/p>\n\n\n\n

          Solution: Governments use price controls and taxes to protect public welfare and regulate markets. Besides tobacco and alcohol, price controls are often applied to essential goods like medicines, food grains, cooking gas, and electricity. These controls are set to keep important products affordable, especially for weaker sections of society, and to prevent unfair price increases. Taxes on harmful goods discourage consumption, while subsidies and price limits on essentials ensure availability. Government intervention helps maintain balance between consumers’ needs and producers’ interests, promoting a fair and stable economy.<\/p>\n\n\n\n

          Q.11: Can excessive government regulation hurt markets? Explain with suitable exa<\/strong>mples.<\/p>\n\n\n\n

          Solution: Yes, excessive government regulation can harm markets in multiple ways:<\/p>\n\n\n\n

            \n
          1. Price Distortions and Reduced Producer Incentives:<\/strong> When authorities impose price caps below the market level (for example, a price ceiling on wheat), producers\u2019 profits decline. For instance, if the government fixes wheat at \u20b920 per kg\u20b920 per kg while the market price is \u20b930\u20b930, farmers receive less income. That can cause production to fall and shortages to emerge because growing wheat may no longer be profitable.<\/li>\n\n\n\n
          2. Compliance Burdens: <\/strong>An abundance of rules, licenses, and permits raises the cost and complexity of running a business. For example, a small restaurant might need multiple clearances for food safety, fire safety, and pollution control. The time and expense involved can deter small firms from starting up or expanding.<\/li>\n\n\n\n
          3. Discourages Innovation and Entrepreneurship:<\/strong> Heavy regulation and price controls reduce the incentive to invest in new ideas or improved technology. For example, if price controls prevent farmers from earning enough, they may avoid investing in better seeds or irrigation, which lowers productivity and output over time.<\/li>\n<\/ol>\n\n\n\n

            In summary, while some regulation is necessary to protect consumers and ensure fairness, excessive government control can produce shortages, reduce business activity, and stifle innovation.<\/p>\n\n\n\n

            Q.12: In the table below, different prices of guava are given,<\/strong><\/p>\n\n\n\n

              \n
            1. Think and write how much guava you will buy at each price.<\/li>\n\n\n\n
            2. Ask the same question to three of your friends and fill in the table.<\/li>\n\n\n\n
            3. Also make a graph for each one of you and one final graph for the total quantity.<\/li>\n<\/ol>\n\n\n\n
              Price<\/strong><\/td>You<\/strong><\/td>Friend 1<\/strong><\/td>Friend 2<\/strong><\/td>Friend 3<\/strong><\/td>Total<\/strong><\/td><\/tr>
              \u20b9 100\/kg<\/td> <\/td> <\/td> <\/td> <\/td> <\/td><\/tr>
              \u20b9 80\/kg<\/td> <\/td> <\/td> <\/td> <\/td> <\/td><\/tr>
              \u20b9 50\/kg<\/td> <\/td> <\/td> <\/td> <\/td> <\/td><\/tr>
              \u20b9 20\/kg<\/td> <\/td> <\/td> <\/td> <\/td> <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

              Solution:<\/p>\n\n\n\n

                \n
              1. As the price decreases, I would buy more guavas because they become more affordable. For example: Price<\/strong> You (kg)<\/strong> 2100\/kg 0.5 280\/kg 1 250\/kg 2 \u096820\/kg 4<\/li>\n\n\n\n
              2. Suppose my friends gave these answers: Price<\/strong> You<\/strong> Friend 1<\/strong> Friend 2<\/strong> Friend 3<\/strong> Friend 4<\/strong> 2100\/kg 0.5 1 0.5 1 0.5 \u096880\/kg 1 2 1 2 1 250\/kg 2 3 2 3 2 \u096820\/kg 4 5 4 5 4<\/li>\n\n\n\n
              3. Make a graph for each and one for total quantity: Each person’s graph<\/strong> will show a downward-sloping demand curve: as price falls, quantity demanded rises. Total quantity graph:<\/strong> Add all quantities at each price. Price<\/strong> Total Quantity (kg)<\/strong> 2100\/kg 3.5 \u096880\/kg 7 250\/kg 12 \u096820\/kg 22<\/li>\n<\/ol>\n\n\n\n

                Key Point:<\/strong>
                Demand increases as price decreases for everyone, and the total market demand is the sum of all individual demands. The graph for total demand will be flatter and more responsive than individual graphs.<\/p>\n\n\n\n

                Q.13: Visit the nearby vegetable market and try to find answers to the following questions.<\/strong><\/p>\n\n\n\n

                  \n
                1. Who decides the prices of different vegetables in the vegetable market?<\/li>\n\n\n\n
                2. Sometimes the prices of a few vegetables is too high, and sometimes too low. Why is this?<\/li>\n\n\n\n
                3. The price of tomatoes is high in the morning and eventually gets lower by the evening. Have you ever noticed this? Comment.<\/li>\n<\/ol>\n\n\n\n

                  Solution:<\/p>\n\n\n\n

                    \n
                  1. The prices of vegetables in the market are mainly decided by the interaction between buyers and sellers. Sellers set prices based on how much supply they have and what they think buyers are willing to pay. If there are many sellers and a lot of vegetables, prices may be lower. If there are fewer sellers or less supply, prices may be higher.<\/li>\n\n\n\n
                  2. Prices can be too high or too low due to changes in demand and supply. If a vegetable is in short supply (for example, due to bad weather or transport problems), its price goes up. If there is a bumper crop and too much supply, prices fall. Festivals, seasons, and even rumours can also affect prices.<\/li>\n\n\n\n
                  3. Yes, this happens because demand is higher in the morning when most buyers come to shop. Sellers know they can get a better price early in the day. By evening, if there are unsold tomatoes left, sellers lower the price to avoid wastage and sell off their stock. This shows how prices change throughout the day based on demand and supply.<\/li>\n<\/ol>\n\n\n\n

                    Q.14: Categorise the following combination of goods into substitute goods and complementary goods.<\/strong><\/p>\n\n\n\n

                      \n
                    1. Movie ticket in the cinema hall and popcorn<\/li>\n\n\n\n
                    2. Eraser and pencil<\/li>\n\n\n\n
                    3. Laptop and computer<\/li>\n\n\n\n
                    4. Air Conditioner and cooler<\/li>\n\n\n\n
                    5. Notebook and pen<\/li>\n\n\n\n
                    6. Apple and banana<\/li>\n\n\n\n
                    7. Mobile and earphones<\/li>\n<\/ol>\n\n\n\n

                      Solution: Substitute Goods:<\/strong> Goods that can replace each other and satisfy similar needs.<\/p>\n\n\n\n